• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Tubes / Valves

All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum
I
5842 headphone amplifier
Replies
68
Views
9K
itsikhefez
I
R
HELP : anode choke
Replies
23
Views
2K
BarG01
B
tiefbassuebertr
Phono Pre-Amplifiers with Active Equalization RIAA Network - within 1 or 2 Voltage Gain Stages: Pros & Cons?
Replies
62
Views
6K
Chris Hornbeck
Chris Hornbeck
S
Croft Super Micro A diy
Replies
9
Views
2K
Alex M
A
S
How much 2E22 anode resistance if run 385V 75ma?
Replies
1
Views
286
Diabolical Artificer
Diabolical Artificer
L
Uses for old output transformers
Replies
20
Views
2K
Diabolical Artificer
Diabolical Artificer
Vinylsavor
Sakuma's bleeder tubes and series connected transfomers
Replies
157
Views
23K
schiirrn
S
Tuberabbit
Fixed bias design
Replies
35
Views
4K
6A3sUMMER
6
M
Replacing capacitors, but can't find the correct values.
Replies
12
Views
2K
moncharleskey
M
V
EAR802 volume potentiometer question
Replies
0
Views
385
volkerw
V
A
Russian valves
Replies
23
Views
2K
gupsta
G
KenCalgary
My First DIY Experience: An Aikido/Tetra Preamp
Replies
39
Views
21K
dddac
dddac
E
Constant current source as anode load-sonic benefits
Replies
49
Views
5K
batteryman
B
K
audio research classic 30 transistor HELP code needed
Replies
0
Views
300
Kesslerng
K
S
Máximum AC Voltage for 5U4G or 5Z3 or 5931 tubes.
Replies
1
Views
271
trobbins
trobbins
H
Diy tube preamp with extern dc Power supply, what is it?
Replies
2
Views
454
OldHector
OldHector
mobyd
Triode Electronics (Japan) TRV35SE
Replies
4
Views
483
vinylkid58
vinylkid58
M
Check this tube amp circuit for me please
Replies
10
Views
650
6A3sUMMER
6
SoaDMTGguy
Where should I measure "ambient" temperature?
Replies
35
Views
2K
mdpaudio
M
C
does Tamura XE 45 8(kOhm) output transformer fit for a 300B Push Pull?
Replies
14
Views
883
cariatide
C
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